Hot Tub & Spa - Heater Unions, Collars & Small Parts

In this section you will find sensors and small parts including heater o-rings and gaskets. Suitable for all major branded heaters and spas.

See also:  
Low Flow Heaters    
Heater Elements   
Flow Thru Heaters 

Helpful Artical: 
Replacing a Balboa Heater

Unsure what replacement part you need? Send us an image of your part

In this section you will find sensors and small parts including heater o-rings and gaskets. Suitable for all major branded heaters and spas.

See also:  
Low Flow Heaters    
Heater Elements   
Flow Thru Heaters 

Helpful Artical: 
Replacing a Balboa Heater

Unsure what replacement part you need? Send us an image of your part

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Spares Available
Spares Available
  • HydroQuip Heater Tailpiece
  • 1.5" (Socket)
  • White
  • PVC Plastic
In stock 5 in stock
In stock Same day dispatch on orders before 15:00
£4.50
Saving: £2.00
  • HydroQuip Heater Tailpiece
  • 1.5" (Spigot/Male)
  • White
  • PVC Plastic
In stock 9 in stock
In stock Same day dispatch on orders before 15:00
£2.08
Saving: £0.28
  • Balboa Heater Gasket
  • Centre Bead
  • 2.0" Inch (74mm OD)
  • Suitable for Heater & Pump Unions
In stock 401 in stock
In stock Same day dispatch on orders before 15:00
£1.66
 
  • Balboa Heater Union Collar
  • Fits 2" Balboa Heaters
  • Black PVC
In stock 1 in stock
In stock Same day dispatch on orders before 15:00
£4.99
Saving: £0.83
  • Balboa M7 Sensor
  • 30cm Cable Length
  • Suitable for GS/GL Spa Packs
  • 53605

» Find out more
In stock 15 in stock
In stock Same day dispatch on orders before 15:00
£21.24
Saving: £3.48
12 Inch Cable
Inc. Nut & Washer
6mm Dia. Probe
  • Barb 3/4" Kit with o-rings
  • Fits Watkins Double Barrel Heater (No Fault Heater)
In stock 2 in stock
In stock Same day dispatch on orders before 15:00
£32.08
Saving: £6.42
  • Drain Tube Extension Kit
  • Suitable for Hydroquip Double Barrel heater
In stock 2 in stock
In stock Same day dispatch on orders before 15:00
£6.44
Saving: £1.29
  • Gasket Kit (4 Pieces)
  • Fits Watkins Double Barrel Heater (No Fault Heater)
In stock 7 in stock
In stock Same day dispatch on orders before 15:00
£10.00
Saving: £3.04
  • Gasket
  • 1.5" inside diameter
  • Suitable for Heaters
In stock 23 in stock
In stock Same day dispatch on orders before 15:00
In stock 25.0000 more on order
£1.66
 
  • Balboa Gasket
  • With Centre Bead
  • 1.5" / 38mm inside diameter
  • 60mm outside diameter
In stock 23 in stock
In stock Same day dispatch on orders before 15:00
In stock 25.0000 more on order
£1.66
 
  • HydroQuip Heater Tailpiece
  • 1.0" (Socket)
  • White
  • PVC Plastic
In stock 10 in stock
In stock Same day dispatch on orders before 15:00
£1.66
Saving: £0.43
  • HydroQuip Heater Tailpiece
  • 2.0"(Spigot/Male Short)
  • White
  • PVC Plastic
In stock 5 in stock
In stock Same day dispatch on orders before 15:00
£7.50
Saving: £2.00
  • HydroQuip Heater Tailpiece
  • 2.0" Thread x 1.5" Socket
  • White
  • PVC Plastic
In stock 10 in stock
In stock Same day dispatch on orders before 15:00
£6.74
Saving: £2.76
  • HydroQuip Heater Tailpiece
  • 2.0" (Socket Short)
  • White
  • PVC Plastic
In stock 1 in stock
In stock Same day dispatch on orders before 15:00
In stock 10.0000 more on order
£2.08
Saving: £0.34
  • HydroQuip Heater Tailpiece
  • 2.0 " Thread x 2.0" Spig /1.5" Soc
  • White
  • PVC Plastic
In stock 5 in stock
In stock Same day dispatch on orders before 15:00
£8.39
Saving: £1.11
Heater Tailpiece 2.0"
2.0" Thread
2.0" Spig /1.5" Soc
  • HydroQuip Heater Tailpiece 2.00" 
  • 3/4" 90 Degree Barb
In stock 9 in stock
In stock Same day dispatch on orders before 15:00
£6.66
Saving: £2.14
  • HydroQuip Heater Tailpiece 2.00"
  • 1" 90 Degree Barb
Available for Pre Order Special Order Item
Alert Please contact us for a lead time
£6.66
Saving: £2.79
  • HydroQuip Heater Tailpiece 3.00" 
  • 3/4"  90 Degree Barb
In stock 18 in stock
In stock Same day dispatch on orders before 15:00
£4.16
 
  • HydroQuip Heater Union Nut & Retainer 
  • 2.00"
In stock 9 in stock
In stock Same day dispatch on orders before 15:00
£14.79
Saving: £2.21
  • HydroQuip Heater Union Nut & Retainer
  • 3.00 "
In stock 13 in stock
In stock Same day dispatch on orders before 15:00
£6.49
Saving: £6.01
  • Split Nut for Heater Union
  • 2.0" 
  • Supplied with screws
In stock 7 in stock
In stock Same day dispatch on orders before 15:00
£6.88
Saving: £2.62
  • Split Nut for Heater Union
  • 1.5" 
  • Supplied with screws
In stock 4 in stock
In stock Same day dispatch on orders before 15:00
In stock 10.0000 more on order
£6.55
 
  • HydroQuip Heater Union Nut & Retainer 
  • 1.50 "
In stock 10 in stock
In stock Same day dispatch on orders before 15:00
£13.52
Saving: £3.48
  • Suitable for In.clear & In.Therm
  • Includes required screws
  • Black Finish
In stock 1 in stock
In stock Same day dispatch on orders before 15:00
£14.16
Saving: £3.32
  • HydroQuip Replacement Kit
  • Hi-Limit Sensor, Temperature sensor & o-rings
  • Fits : Watkins Double Barrel Heater (Watkins NO Fault)
In stock 5 in stock
In stock Same day dispatch on orders before 15:00
£29.27
 
  • Spa-Quip Auto Reset Klixon
  • Suitable for All Spa-Quip Heaters
  • Power: 12V AC
In stock 9 in stock
In stock Same day dispatch on orders before 15:00
£4.58
Saving: £0.36
  • Spa-Quip Heater Union
  • Single Unit
  • Suitable for SP600/SP601/SP800/SP1200
In stock 2 in stock
In stock Same day dispatch on orders before 15:00
In stock 10.0000 more on order
£24.58
Saving: £7.84
  • Spa-Quip O-Ring
  • 13mm O/D x 2mm Thickness
  • Suitable for Spa-Quip Optical Water Sensor
Currently Out of Stock Currently Out of Stock
Available for Pre Order Available for Pre Order
£0.83
 
  • Split nut union
  • Size: 2" 
  • Supplied with screws
Currently Out of Stock Currently Out of Stock
Available for Pre Order Available for Pre Order
Available for Pre Order 12 more on order
£2.49
Saving: £0.65
  • Split nut union
  • Size: 1.5
  • Supplied with screws
In stock 7 in stock
In stock Same day dispatch on orders before 15:00
£2.91
Saving: £0.47
  • Split Nut Heater Union
  • 2.0" O/D
  • For Balboa Heaters
In stock 22 in stock
In stock Same day dispatch on orders before 15:00
£4.99
Saving: £0.83
  • Waterway Flat Gasket
  • 2.00" O/D
  • White
  • Suitable for Heater Unions
In stock 136 in stock
In stock Same day dispatch on orders before 15:00
£0.64
Saving: £0.11
  • Waterway Flat Gasket
  • 60mm OD x 2.5mm Thickness
  • White
In stock 54 in stock
In stock Same day dispatch on orders before 15:00
£0.54
Saving: £0.09
  • Waterway Gasket
  • Centre Bead
  • Suitable for Heater & Pump Unions
In stock 40 in stock
In stock Same day dispatch on orders before 15:00
£0.54
Saving: £0.09
  • Waterway Gasket - Centre Bead
  • Flat/Bead Single Side
  • 74mm OD x 5.0mm
  • 51mm ID
  • Suitable for Heater & Pump Unions
In stock 52 in stock
In stock Same day dispatch on orders before 15:00
In stock 50.0000 more on order
£0.68
Saving: £0.13
  • Waterway Heater Tailpiece
  • 1.5" Socket
  • White
  • PVC Plastic
Currently Out of Stock Currently Out of Stock
Available for Pre Order Available for Pre Order
Available for Pre Order 10 more on order
£1.66
Saving: £0.23
  • Waterway Heater Tailpiece
  • 2.0" Socket
  • White
  • PVC Plastic
Currently Out of Stock Currently Out of Stock
Available for Pre Order Available for Pre Order
£2.08
Saving: £0.48
  • Waterway Heater Tailpiece
  • 2.0" Spigot (Male)
  • White
  • PVC Plastic
In stock 3 in stock
In stock Same day dispatch on orders before 15:00
In stock 1.0000 more on order
£2.08
Saving: £0.43
  • Waterway O-Ring
  • 68mm OD x 2.5mm Thickness
  • Suitable for 2" Heater Unions & Pump Unions
In stock 37 in stock
In stock Same day dispatch on orders before 15:00
£0.52
Saving: £0.09
  • Waterway O-Ring
  • 76mm OD x 3.5mm Thickness
  • Suitable for 2.5" Pump / Heater Unions
In stock 27 in stock
In stock Same day dispatch on orders before 15:00
£1.13
Saving: £0.20